(19)

(11)

EP 4 153 919 A1

(12)

(43) Date of publication: 29.03.2023 Bulletin 2023/13 (21) Application number: 21720314.0 (22) Date of filing: 26.03.2021

(51) International Patent Classification (IPC):  F24F 11/49(2018.01) F24F 11/30(2018.01) F24F 11/89(2018.01) (52) Cooperative Patent Classification (CPC): F24F 11/49; F24F 11/89; F24F 2221/32; F24F 11/30; Y02B 30/56 (86) International application number: PCT/IB2021/052518 (87) International publication number: WO 2021/234470 (25.11.2021 Gazette 2021/47)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 19.05.2020 BE 202005351 (71) Applicant: Renson Ventilation NV 8790 Waregem (BE)	(72) Inventors: VANDEKERCKHOVE, Steven Chris Emmanuel 8500 Kortrijk (BE) MELANGE, Cedric Fernand 8800 Roeselare (BE) (74) Representative: IP HILLS NV  Hubert Frère-Orbanlaan 329 9000 Gent 9000 Gent (BE)